I think what he's saying is, as band directors, we tend to lose some of the music education focus of our jobs when we have to deal with the difficult and sometimes thankless administrative task of running a marching band. True, it's a great opportunity for advocacy when you have a a large, semi-captive audience... but it sickens the heart sometimes to think that no matter how hard your kids work or how awesome your show is, there's always going to be NIU players, fellow students, football fans and school administrators who don't appreciate or even despise what you do because it's not masculine enough for their tastes.
We got into music ed to make a difference in our kids' lives and share our love for the power of music... marching band can be a powerful tool for life lessons and self-discipline, but teaching the more artistic side of music is much easier in a concert band setting.